Consider a gas-phase reaction 2A→R + 2S with unknown kinetics. If a space velocity of 1/min is needed for 90% conversion of A in a plug flow reactor, find the corresponding space-time and mean residence time or holding time of fluid in the plug flow reactor.

Problem 4 The reversible, exothermic, liquid phase, homogeneous reaction A ₹R is being carried out in two ideal CSTRs. Both reactors operate at 150°C. The molar flow rate of A entering the first CSTR is 55,000 mol/h, the concentration of A in this stream is 6.5 mol/L, and the concentration of R is zero. The fractional conversion of A in the outlet stream from the second CSTR is 0.75. The fractional conversion is based on the molar flow rate entering the first CSTR. The reaction is first order in both directions. The rate constant for the forward reaction is 1.3 h-¹ and the equilibrium constant based on concentration at 150°C is 10.0. If the volume of the second CSTR is 10,000 L, what is the required volume of the first CSTR?

The overall gas phase reaction  3A --> B + 2C occurs via the following sequence of elementary steps 2A <--> I1 + B    k1,k-1 A + I1 --> 2I2        k2 I2 --> C               k3 1. write an expression for the overall reaction rate, r, in terms of the rate step 3, r3 2. using the answer from 1, obtain an expression for the reaction rate, r, in terms of rate constants and concentrations of reactants and products, only use PSSH.

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